I can say without fear of contradiction that the people who comment here at DC are, over-all, some of the most educated, intelligent and respectful ones you'll see out there. Kudos to them. Visitor Pablo Chavez recently said this same thing:
I have been to a lot of discussion forums, and I have never read so many intelligent and civil posts in my life. Tempers flare from time to time, but this is a great site.